ISOU (Isidore). Ballets ciselants. Polythanasiques, Hypergraphiques et Infinitésimaux (1960-1964). Paris, Roberto Altmann, 1965 Small in-8, paperback, untrimmed. First edition of the second work to appear in the Avant-Garde collection directed by the artist Roberto Altmann. One of 18 copies on Lana white vellum, signed by the author and the artist, containing an etching signed by Roberto Altmann and an original ink drawing signed by Isidore Isou. A perfectly preserved copy as issued.